KFU. Card publication. Contact angle hysteresis in the clay-water-air system of soils

KAZAN
FEDERAL UNIVERSITY

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CONTACT ANGLE HYSTERESIS IN THE CLAY-WATER-AIR SYSTEM OF SOILS

Form of presentation

Articles in international journals and collections

Year of publication

2020

Язык

английский

Authors, employees of KFU

Galeev Akhmet Askhatovich, author

Korolev Eduard Anatolevich, author

Sofinskaya Oksana Aleksandrovna, author

Bibliographic description in the original language

Sofinskaya, O.A. Contact angle hysteresis in the clay-water-air system of soils / O. A. Sofinskaya, A. A. Galeev, E. A. Korolev // Processes and Phenomena on the Boundary Between Biogenic and Abiogenic Nature. Collection of papers presented at VI International Symposium. Part of the Lecture Notes in Earth System Sciences book series (LNESS). Ser. Biomat - Biofilms - Hydrophobicity - Hydrophilicity - Clay minerals - Surface tension - Contact angle - Hysteresis of wettability - Water spreading - Water repellency Saint-Petersburg State University. 2020. P. 179-194.

Annotation

The purpose of this research is to study the change in wettability of clays due to the influence of mesophilic soil microorganisms' activity when adding model contaminants: water-in-oil emulsion, glycerol and oleic acid. During the experiments, the objectives of this study were to specify peculiarities of wetting contact angle hysteresis of clays with substrates of different mineral composition and microbial activity. Hydrophilicity/hydrophobicity of the stimulator for microbial activity does not have a clear effect on clay properties. The surface heterogeneity mostly increases with time, perhaps, due to biofilm exudates whatever was a type of microbial stimulator. Chemical and geometric heterogeneities played comparable roles in the surface hydrophilic-hydrophobic balance. Results obtained prove that microbial communities and/or the Fe chemical state alteration (pyrite, hematite or goethite) were responsible for both hydrophilization and hydrophobization of the surface. The equation for the drop spreading rate was presented and verified by well comparison of experimental results with simulations.

Keywords

Biomat, Biofilms, Hydrophobicity, Hydrophilicity, Clay minerals, Surface tension, Contact angle, Hysteresis of wettability, Water spreading, Water repellency

The name of the journal

Lecture Notes in Earth System Sciences

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/160366/F_Contact_Angle__ysteresis.pdf?sequence=1&isAllowed=y

URL

https://link.springer.com/book/10.1007%2F978-3-030-21614-6

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=244964&p_lang=2

Resource files

File name	Size (MB)	Format
F_Contact_Angle__ysteresis.pdf	8,36	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Galeev Akhmet Askhatovich	ru_RU
dc.contributor.author	Korolev Eduard Anatolevich	ru_RU
dc.contributor.author	Sofinskaya Oksana Aleksandrovna	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Sofinskaya, O.A. Contact angle hysteresis in the clay-water-air system of soils / O. A. Sofinskaya, A. A. Galeev, E. A. Korolev // Processes and Phenomena on the Boundary Between Biogenic and Abiogenic Nature. Collection of papers presented at VI International Symposium. Part of the Lecture Notes in Earth System Sciences book series (LNESS). Ser. Biomat - Biofilms - Hydrophobicity - Hydrophilicity - Clay minerals - Surface tension - Contact angle - Hysteresis of wettability - Water spreading - Water repellency Saint-Petersburg State University. 2020. P. 179-194.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=244964&p_lang=2	ru_RU
dc.description.abstract	Lecture Notes in Earth System Sciences	ru_RU
dc.description.abstract	The purpose of this research is to study the change in wettability of clays due to the influence of mesophilic soil microorganisms' activity when adding model contaminants: water-in-oil emulsion, glycerol and oleic acid. During the experiments, the objectives of this study were to specify peculiarities of wetting contact angle hysteresis of clays with substrates of different mineral composition and microbial activity. Hydrophilicity/hydrophobicity of the stimulator for microbial activity does not have a clear effect on clay properties. The surface heterogeneity mostly increases with time, perhaps, due to biofilm exudates whatever was a type of microbial stimulator. Chemical and geometric heterogeneities played comparable roles in the surface hydrophilic-hydrophobic balance. Results obtained prove that microbial communities and/or the Fe chemical state alteration (pyrite, hematite or goethite) were responsible for both hydrophilization and hydrophobization of the surface. The equation for the drop spreading rate was presented and verified by well comparison of experimental results with simulations.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Biomat	ru_RU
dc.subject	Biofilms	ru_RU
dc.subject	Hydrophobicity	ru_RU
dc.subject	Hydrophilicity	ru_RU
dc.subject	Clay minerals	ru_RU
dc.subject	Surface tension	ru_RU
dc.subject	Contact angle	ru_RU
dc.subject	Hysteresis of wettability	ru_RU
dc.subject	Water spreading	ru_RU
dc.subject	Water repellency	ru_RU
dc.title	Contact angle hysteresis in the clay-water-air system of soils	ru_RU
dc.type	Articles in international journals and collections	ru_RU